YOKOGAWA FG420, Руководство пользователя

Страница: 104 / 180

90 IM FG410-01EN
4. BASIC OPERATION
4.8.3 Common sweep settings and manipulations
This subsection describes the settings and manipulations that are used in common regardless of the
item to be swept.
a) To set the oscillation mode to sweep → Oscillation mode setting
On the Oscillator setting screen, set
[Mode] (oscillation mode) to [Sweep].
This changes the mode to the sweep
oscillation mode.
In the sweep oscillation mode, the
setting screen consists of three pages,
which can be switched with the
NEXT
NEXT key.
b) To select the item to be swept → Sweep type setting
The following five sweep items can be selected in [Type] (sweep type) on the 2nd page of the setting
screen.
Frequency sweep [Freq]

p.99
Phase sweep [Phase]

p.101
Amplitude sweep [Amptd]

p.103
DC offset sweep [Offset]

p.105
Duty sweep [Duty]

p.107
c) To set the sweep range and time
Set the following items on the 2nd page of the setting screen.
• Start value [Start]
• Stop value [Stop]
• Sweep time [Time]: This is the transition time from the start value to the stop value.
For details, refer to the description of each sweep type.
d) To set the sweep range with center and span
When the start value or stop value input field is open on the 2nd page of the setting screen and the
current value is displayed, the [Center] or [Span] soft key is displayed. When this key is pressed, the
center value or span value input field opens, and the item displays change from [Start] and [Stop] to
[Center] and [Span], respectively.
The [Center] or [Span] soft key changes to [Start] or [Stop]. When the [Start] or [Stop] soft key is
pressed at this time, the start value or stop value input field is displayed.
The center value is the average of the start value and stop value. The span value is the absolute value
of the difference between the start value and the stop value. Even if frequency log sweep is selected,
the center value is the linear average of the start value and stop value.
Even when center value and span value display are selected, the relation of magnitude between the
start value and stop value is saved.
e) To sweep a sawtooth wave → One-way sweep
Set [SwpFctn] (sweep function) on the 2nd page of the setting screen to [Lin-OneWay]
In the case of frequency sweep, it is also possible to set the slope to [Lin-OneWay] (linear) or [Log-
OneWay] (log).
Select [Sweep] in
[Mode] and then
press the ENTER
key.
Sweep type